Die and punch for making metal crowns for teeth



(No Model.) 2 Sheets-Sheet 1,

J. J. R. PATRICK.

DIE AND PUNCH FOR MAKING METAL OROWNS FOR TEETH.

No. 381,416. Patented Apr. 17, 1888.

(No Model.) 2 Sheets-Sheet 2.

J. J. R. PATRICK. DIE AND PUNCH FOR MAKING METAL OROWNS FOR TEETH.

No! 381,416. Patented Apr. 17, 1888.

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JOHN J. R. PATRICK, OF BELLEVILLE, ILLINOIS.

DIE AND PUNCH FOR MAKING METAL CROWNS FOR TEETH.

SPECIFICATION forming part of Letters Patent No. 381,416, dated April 1'7, 1888.

(No model.)

To all whom it may concern:

Be it known that 1, JOHN J. R. PATRICK, a citizen of the United States, residing at Belleville, in the county of St. Clair and State of Illinois, have invented certain new and useful Improvements in Dies and Punches for Making Metal Crowns for Teeth; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a side elevation. Fig. 2 is a front elevation. Fig. 3 is a transverse section. Fig. 4 is a vertical section. Figs. 5, 6, 7, 8, 9,10, 11, and 12 are detail views of various parts; and Fig. 9 is a view of the male die.

My invention relates to dies and punches for making metal crowns for teeth; and it consists in the construction and novel combination of parts, as hereinafter described, and pointed out in the claim.

Referring by letter to the accompanying drawings, A designates the press, the base A of which is provided with the integral die-seat B, having the rear flange, B, and the front flange, B", the latter being provided with the set-screw B", which is designed to hold the cutting-die C in place at any required adjustment in the die-seat 13.

The die-seat Bis provided with a dischargeopening, D,which is slightly greater in diameter than the largest female die in either the cutting-dieE, the cupping-die F, or the shrinking-die G, in order thatthe blanks cut from the metal plates used will fall through said discharge-opening when the punch or male die is raised out of the female die.

H is the tool-holder, which is provided with a seat, H, for the upper or shank ends of the punches, which are provided with shoulders H", which limit the distance to which the upper end of the punches enter the seat H, and aset-serew, H, enters the holder H from one side near its lower end, and when turned up to place holds thepunches firmly in the seat H.

The holder H is provided with a nearly heartshaped recess or opening, Hi extending laterally through it between its upper and lower ends, and through this opening H the cam-shaftI extends and has its bearings in the vertical side walls, I I", of the hollow head I of the press standard I. The cam-shaft is operated by a lever, X, to work the holder. The side wall, I, of the hollow head I is removable to permit of the insertion of the toolholder H, and this removable side wall is socured in place by screw-bolts I Iiwhich pass through lugs l on said side wall, and enter threaded seats I 1 011 the exterior faces of the end walls of the hollow head F.

J designates the bar containing the female dies J for the larger and smaller molars. Other bars are provided with female dies for upper and lower, larger and smaller bicuspids, and a sufficient number of these bars with said female dies are provided, so that by their use in conj auction with male dies for each of the female dies all sizes of crowns may be made, so that all sizes of teeth, both rights and lofts and upper and lower jaw-teeth, may be treated and fitted. The thickness of the metal plate for use in the dies should not be greater than No. 29, nor thinner than No. 30, American standard gage.

To form the blanks for the crowns, slip the cutting-punch P, for the size of crown desired, in place in the tool-holder H, and tighten the set-screw H to hold it firmly in place, the point of the same entering the annular groove H in the shank of the tool. Then slide the cuttingdie E in place under the cutter gently, so that the latter will passfreelyinto the die. While there secure the die in place with the thumbscrew B in front of the bed of the press,which will give the true center. For the larger molars I use the larger cutters to cut the blanks, and for the smaller molars I use the smaller cutters to cut the smaller blanks. For large bicuspids I use the third sized cutter, and for lower or upper small bicuspids I use the smaller cutter. After the blanks havebeen cut, remove the cutter and die. If a large crown is needed, slip the larger plunger, I in place and secure it with the thumb-screw H. Then slide the cupping'dieFin place under the plunger, bringing down the plunger into the large hole, and whilethere secure the cupping die in place in the die-seat B. This gives the true center. Then lift the plunger P from the hole Q and slip the large blank into the countersink Q at the upper end of the hole Q. Then bring down the plunger and force the 5 blank through the die. This forms the cup. Anneal the cup thus made and remove the cupping-die and plunger from the press. Put the hammer B in place in the same manner as the cutter or plunger was put in. The tooth being selected by number, place the annealed cup in the female die of the bar J, and the male die corresponding in position above the metal. Slide both dies and cup under the hammer and press the male die into the cup. Remove the metal after the first pressure and anneal as before. After pressure, the cervical border of the crown may not be as close to the male die as desired; but a few taps with asmall hammer while the crown is on the die will adjust it.

If the cervical border of the crown is found cervical border, and the deeper the crown is sunk into the shrinking-die the greater will be the contraction of the circumference of the cervical border.

Having described this invention, what I claim, and desire to secure by Letters Patent,

An improved apparatus for the manufacture of metal crowns for teeth, comprising a main frame carrying a standard adapted to receive a vertically-movable tool-holder, thesaid frame having a die-seat with outlet base-aperture receiving interchangeablya cutting-die, a clipping-die, a shrinking-die, and a female die, as described, and provided with means for truing the same with relation to the manipulating-tools, the tool-holder having aslotted body and the shaft of the handlever having a cam engaging the said slot, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN J. R. PATRICK.

Witnesses:

THEO. MUNGEN, PHILIP O. MASI. 

